On Tuesday, October 04, 2016 05:15:16 PM Sinan Kaya wrote: > Restoring the old behavior for IRQ < 256 and the dynamic penalty behavior > will remain effective for IRQ >= 256. > > By the time ACPI gets initialized, this code tries to determine an > IRQ number based on penalty values in this array. It will try to locate > the IRQ with the least penalty assignment so that interrupt sharing is > avoided if possible. > > A couple of notes about the external APIs: > 1. These API can be called before the ACPI is started. Therefore, one > cannot assume that the PCI link objects are initialized for calculating > penalties. > 2. The polarity and trigger information passed via the > acpi_penalize_sci_irq from the BIOS may not match what the IRQ subsystem > is reporting as the call might have been placed before the IRQ is > registered by the interrupt subsystem. > > The reverted changes were in the direction to remove these external API and > try to calculate the penalties at runtime for the ISA, SCI as well as PCI > IRQS. This didn't work out well with the existing platforms. > > Changes from V1 (https://lkml.org/lkml/2016/10/1/106): > * Commit message updates > > Sinan Kaya (3): > Revert "ACPI,PCI,IRQ: reduce static IRQ array size to 16" > ACPI, PCI IRQ: add PCI_USING penalty for ISA interrupts > Revert "ACPI,PCI,IRQ: remove SCI penalize function" > > arch/x86/kernel/acpi/boot.c | 1 + > drivers/acpi/pci_link.c | 71 ++++++++++++++++++++++----------------------- > include/linux/acpi.h | 1 + > 3 files changed, 37 insertions(+), 36 deletions(-) > I've queued up the series, but still waiting on Bjorn's response. Thanks, Rafael -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
